The available locales depend on your operating system; try whether
locale -a
shows them or man pages for "locale" or "nlsinfo" or the
direct approach ls /usr/lib/nls/loc
or ls /usr/lib/nls
or
ls /usr/lib/locale
. Not all the locales that your vendor supports
are necessarily installed: please consult your operating system's
documentation and possibly your local system administration. The
locale names are probably something like xx_XX.(ISO)?8859-N or
xx_XX.(ISO)?8859N, for example fr_CH.ISO8859-1
is the Swiss (CH)
variant of French (fr), ISO Latin (8859) 1 (-1) which is the Western
European character set.